#include<iostream>
using namespace std;

int main()
{
	int m, t, s;
	cin >> m >> t >> s;
	if(t==0)
	{
		cout << '0' << endl;
	}
	else
	{
		if((s/t)>m)
		{
			cout << '0' <<endl;
		}
		else
		{
			if(s%t == 0)
			{
				cout << m-s/t <<endl;
			}
			else
			{
				cout << (m-s/t)-1 <<endl;
			}
		}
	}
		
	return 0;
}

